| 1 | Aldham Porcelains IncNot reported | Corporation | Not reported | Not reported |
| 2 | Alert Systems, Inc.Not reported | Corporation | Not reported | Not reported |
| 3 | Alida CorporationNot reported | Corporation | Not reported | Not reported |
| 4 | Alleva, Dominic & Son, Inc.Not reported | Corporation | Not reported | Not reported |
| 5 | Allied Graphic Industries, Inc.Not reported | Corporation | Not reported | Not reported |
| 6 | The Antietam House of Phoenixville, Inc.Not reported | Corporation | Not reported | Not reported |
| 7 | Ardes Buick-pontiac, Inc.Not reported | Corporation | Not reported | Not reported |
| 8 | Ardmore Paperback Book Shop, Inc.Not reported | Corporation | Not reported | Not reported |
| 9 | Argo Steel Erectors, Inc.Not reported | Corporation | Not reported | Not reported |
| 10 | Arrow Associates, Inc.Not reported | Corporation | Not reported | Not reported |
| 11 | Art's Auto Servicenter, Inc.Not reported | Corporation | Not reported | Not reported |
| 12 | Automotive Industrial Management, Inc.Not reported | Corporation | Not reported | Not reported |
| 13 | Automatic Measurements Co.Not reported | Corporation | Not reported | Not reported |
| 14 | Babe Ruth League of PhoenixvilleNot reported | Nonprofit | Not reported | Not reported |
| 15 | Barium Steel CorporationNot reported | Corporation | Not reported | Not reported |
| 16 | Barta Industries, Inc.Not reported | Corporation | Not reported | Not reported |
| 17 | Barton Farms IncNot reported | Corporation | Not reported | Not reported |
| 18 | Beacon Loan Corp. of PhoenixvilleNot reported | Corporation | Not reported | Not reported |
| 19 | Beaver Sportsmen's Club, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 20 | Bev-maid, Inc.Not reported | Corporation | Not reported | Not reported |
| 21 | Beverageland IncNot reported | Corporation | Not reported | Not reported |
| 22 | Arthur J. Bloom, Inc.Not reported | Corporation | Not reported | Not reported |
| 23 | Boehringer Laboratories, Inc.Not reported | Corporation | Not reported | Not reported |
| 24 | The Book Bin, Inc.Not reported | Corporation | Not reported | Not reported |
| 25 | Bortell, Inc.Not reported | Corporation | Not reported | Not reported |
| 26 | Bowling Center Service & Supply Company, Inc.Not reported | Corporation | Not reported | Not reported |
| 27 | Brandywine Angus Breeders IncNot reported | Nonprofit | Not reported | Not reported |
| 28 | Bread of Life MissionNot reported | Nonprofit | Not reported | Not reported |
| 29 | Bridge Street Center, Inc.Not reported | Corporation | Not reported | Not reported |
| 30 | Brotherhood Bible Company, Inc.Not reported | Corporation | Not reported | Not reported |
| 31 | Brown Brothers Contractors IncNot reported | Corporation | Not reported | Not reported |
| 32 | Bucktails Hunting Club of Montgomery CountyNot reported | Nonprofit | Not reported | Not reported |
| 33 | The Bull Tavern, Inc.Not reported | Corporation | Not reported | Not reported |
| 34 | Byrne CorporationNot reported | Corporation | Not reported | Not reported |
| 35 | Canterbury Inn, Inc.Not reported | Corporation | Not reported | Not reported |
| 36 | Carfab, Inc.Not reported | Corporation | Not reported | Not reported |
| 37 | Carrier Equipment Co IncNot reported | Corporation | Not reported | Not reported |
| 38 | Central Iron and Steel CompanyNot reported | Corporation | Not reported | Not reported |
| 39 | Charlestown Arms CorporationNot reported | Corporation | Not reported | Not reported |
| 40 | Charlestown Associates, Inc.Not reported | Corporation | Not reported | Not reported |
| 41 | Charlestown Playhouse IncNot reported | Nonprofit | Not reported | Not reported |
| 42 | Charolles Valley, Inc.Not reported | Corporation | Not reported | Not reported |
| 43 | Ches-mont Kart Club, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 44 | Chesapeake Investment CorporationNot reported | Corporation | Not reported | Not reported |
| 45 | Chester Blast Furnace IncNot reported | Corporation | Not reported | Not reported |
| 46 | Chester County Bowling CorporationNot reported | Corporation | Not reported | Not reported |
| 47 | Chester County Tractor Company, Inc.Not reported | Corporation | Not reported | Not reported |
| 48 | Scripture UnionNot reported | Nonprofit | Not reported | Not reported |
| 49 | The Circuit BreakerNot reported | Nonprofit | Not reported | Not reported |
| 50 | Clintox Laboratories, Inc.Not reported | Corporation | Not reported | Not reported |